Don't miss: Armstrong, the science of music and codebreaking

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ExpeRience: The science of music at the Royal Institution in the company of physicist Mark Lewney. Hands-on activities, science demos, auditory hallucinations and a karaoke tent make for a memorable evening on 10 July in London.

The Board of Trustees of the Science Museum, GCHQ

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Top Secret, at London’s Science Museum from 10 July, marks the 100th anniversary of UK intelligence organisation GCHQ with a dive into the world of codebreaking, from the first world war to today’s “war on terror”.